From mboxrd@z Thu Jan  1 00:00:00 1970
From: Edward Shishkin <edward.shishkin@gmail.com>
Subject: Re: The reiser4 ....SDK for experiments outside kernel
Date: Fri, 12 Dec 2008 02:03:15 +0300
Message-ID: <49419C33.7040404@gmail.com>
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To: Ralph <eulenreich@gmx.de>
Cc: reiserfs-devel@vger.kernel.org

Ralph wrote:
> Edward Shishkin wrote:
>   
>> Be careful with the notion of plugin: in reiser4 this is only
>> to manage low-level data storage infrastructure.. That said,
>> first, you should decide what (useful!) feature related to
>> (low-level!) data storage do you want to implement, then think
>> how to implement it in the plugin categories. Most likely you'll
>> need to add new plugin(s) of existing or (unlikely) new interface.
>> For example, in order to support (meta)data checksums you'll need
>> a new node format, and, hence, new node plugin (the NODE interface
>> already exists).
>> All other "plugins" should go to vfs, or to various stackable
>> (distributed) filesystems.
>>     
>
> (meta)data like xattr low-level?
>   

Sure.
It is supposed to be stored on disk.

>   
>> in reiser4 this is only to manage low-level data storage infrastructure
>>     
> ... at this stage of reiser4 is low-level, because the main effort is inclusion in mainline kernel, I thought...
>
> What if you want to write a storage backend for postgresql where content shall be readable per file syntax: 
> cat ./database/contacts/names/name/address/streetname
> (Sure, you can have a postgresql service that exports streetnames....) ??
>
> Look at: H. Reiser writes: 
> "I am going to do the enhanced semantics first"
> ( http://marc.info/?l=reiserfs-devel&m=115363946628080&w=2 )
>
> That is not so low-level ?

I am not a specialist in enhanced semantics.
There is a lot of problems on the storage level ;)

Edward.